Fluid-pressure-control mechanism for oil-burning apparatus



Dec. 3, 1929. E. a. RQDGERS 1,733,113

FLUID PRESSURE CONTROL MECHANISM FOR OIL BURNING APPARATUS Filed July 22, 1927 2 Sheets-Sheet 1 INVENTOR 55.73 am ii. WM

ATTORNEY Dec-.3, 1929. E. B. RODGERS 1,738,118 FLUID PRESSURE CONTROL MECHANISM FOR.OIL BURNING APPARATUS Filed July 22, 192'? 2 Sheets-Sheet" 2 I". 2 mm. N 1101/ 1. I NVENTOR BY 6PM C ATTORNEY Patented Dec. 3, 19 29 UNITED STATES PATENT OFFICE EDWARD BROMLEY RODGERS, OF NEW YORK, N. Y., ASSIGNOR T OLIVE M. PERKINS i FLUID-PRESSURE-GONTBOL MECHANISM FOR OIL-BURNING APPARATUS Application filed July 22, 192?. Serial No. 207,802.

This invention relates to improvements in liquid fuel burning apparatus and more particularly to a novel and improved liquid fuel control mechanism for interrupting the flow of fuel when the pressure falls within predetermined limits.

One of the objects of my invention is to provide in a liquid fuel burning apparatus, valve control means constructed and ar- 1 ranged for opening and closing the oil and gas pipes or lines leading to the nozzle of the burner when the pressure falls below a certain point thus assuring at all times a proper mixture of the oil and gas for ignition.

A further object of my invention is to provide in a liquid fuel burning apparatus, interconnected valve mechanism in the oil and gas pipes or ducts under pressure control including the novel and improved pressure 20 housing or chamber and mechanism therein directly controlling the open and closed positions of said valves in accordance with the created pressure in the system so that a proper mixture and combustion may be had at the 2 point of ignition.

To enable others skilled in the art to more fully comprehend the underlying features of my invention and its practical application to fuel burning systems in general, reference is had to the accompanying drawing showing a preferred form of the invention in which,

Fig. 1 is a view showing the pressure control apparatus and its relation to the burner nozzle.

Fig. 2 is a front view of the pressure control housing.

Fig. 3 is a vertical sectional view through the control housing showing the automatic cut off mechanism.

Fig. f is a sectional view taken on the line 4- 1 of Fig. 3.

Fig. 5 is a sectional view taken on the line 55 of Fig. 1.

Fig. 6 is a sectional view taken on the line 66 of Fig. 3.

In the construction, installation and operation of oil fuel burning apparatus of various types operating on the principle of feeding and conducting heavy oils in the presence of gas, it is necessary that the oil and gas be conducted to the nozzle under pressure. Since the desired pressure may vary between wide limits according to the gravity of the oil and required size of the flame desired, it is required that the system be under automatic control so that when the pressure falls below a certain point, the valves may automatically cut off the flow of oil and gas.

In my copending application Serial No. 207,803, filed July 22, 1927, I have shown and described in considerable detail the construction of the specific type of oil nozzle employed, together with the oil pipe or duct 5 and gas and air pipes or ducts 6, 7 whereby the mixture is ignited at the electrode termi nals 8.

The oil is conducted through an inlet pipe 9 from any suitable source of supply as from an oil tank or reservoir, not shown, through a strainer 10, oil gauge 11 and branch pipe 12 leading to a valve housing 13. A gas pipe or conduit 14- extending from any suitable source of supply also leads to a similar valve housing 15. A fine strainer 16 is interposed in the pipe line 16 between the valve housing 13 and the oil pipe or duct 5 soas to remove any small dirt particles that may have passed through the strainer 10. Within the valve housings 13, 15 I provide interconected valve stems 17 18 each having openings 19 for registration with the gas and oil pipes leading to and from said valve housings. The valve housings are threaded at 19" to bushings 20 formed on a substantially rectangular trough or chamber 21. The threaded ends 19 of the valve stems 17 and 18 are pl'OVlClefl with nuts and washers 21 22 and the ends of the stems are closed by threaded caps 22 detachable from the valve housing. The opposite reduced ends 17 of the valve stems 17, 18 are provided with collars 23 connected thereto by screws 24, being located within the trough or chamber 21 as shown by Figs. l and 6 of the drawings. Access to the collars for their adjustment may be had upon the removal of the threaded stem bolts 25 of the said chamber.

The collars 23 are each formed with an arm 26, each having a slotted end portion 27 and loosely connected by a bolt and nut 28 on the lower end 29 of a threaded stem 30 extending into the chamber 21 above referred to.

The top of the chamber 21 is provided with an opening 30 and rigidly secured on the top of the chamber I provide a pressure housing 31, the bottom flange 32 of which is fastened to the trough 21 by means of the threaded bolts 33 and sealed by a gasket 34. The bottom. 35 of .the pressure housing is formed with'a'boss 36, said boss having a circular opening37 therethrough and through which opening the oil may seep to the trough or chamber 21.

The upper end of the threaded stem 30 is connected to. an internally threaded cylindrical portion 38 of a piston 39 frictionally engaging the inner wall of the pressure housing 31. The top flange portion 42 of the g; pressure housing is sealed by a plate 43 and gasket 44. Extending through the head 45 of the top plate 43 is arod 45 having a lower polygonal socket 46 engaging the cylindrical portion 38 of the piston whereby itmay be adjustably raised and lowered by the wheel 47. A threaded cap 48 and packing gland 49 seal therodextending through the top of the plate 43. The pressure housing is provided at one side with a bushing 50 to which so is connected an oil inlet pipe'51 whereby the oil is fed through theopening 52 into the chamber 53 above the piston. The piston is provided with a series of apertures 54 through which the oil may flow after a certain internal $6 pressurehasbeen obtained- The piston moreover is underthe control of a large resistance or pressure spring'55, the lower end of which engages the'bottom of the pressure housing. The openings 54 in the top of the piston are controlled by a loose valve 57 on the stem which is-held under'tension by a spring 58, the lower end of said spring 58 engaging an adjustable'block 59 locked to the stem 80, and located within the outside spring 55. The smaller spring 58 controlling the action and movement of the valve 57 being under greater tension, greater pressure is required to unseat the valve-to permit the flow of oil through the apertures'54, than is necessary to force'the'piston itself downwardly. The position of the piston, however, may be adjusted against the resistance of the spring by means of the wheel 47.. W le the oil pressure itself will tend to move the piston downwardly and partially openthe valves 17 l8, nevertheless the oil will not flow through the apertures 54 until the pressure has been built up sufficiently to unseat the valve'- 57 against the resistance of the more powerful spring 58, and consequently fully open the valves 17 18. Reversely, it will thus be seen that when the pressure falls below a certain point, the valve 57 will rise and close the openings 54 and as the pressure on the piston falls {M the stem 30 connected thereto will automatically move gradually upwardly with the result that the connected arms 26 will rotate the valve stems 17, 18 and cut off the supply of both gas and oil. Under ordinary conditions when the stem 30 is in its raised or elevated position with the piston, the valve stems 17, 18 are closed preventing the passage of oil and gas. As the pressure in the chamber 53 increases, the piston is urged downwardly slightly until the pressure is sufiicient to overcome the resistance of the spring whereupon the lowering of the piston to its maximum position will rotate and open the valve stems 17, 18. The pressure housing 31 will therefore be full of oil at all times and similarly the chamber 21 will also contain oil so that all the parts are freely lubricated. Leading from the pressure housing 31 is a return pipe 60 to the main oil tank. A branch return pipe 61 from the chamber 21 is provided with a check valve 62 and is also in the line to the return conduit 63 leading to the oil supply reservoir.

From the above construction it will be easily understood that since the oil and gas supply leading to the burner nozzle is directly effected for its proper combustion by the oil pressure, the operation of the system may be maintained substantially uniform at all times within set limits when the valve mechanism is once adjusted and set according to the grade of oil being consumed. Just so long as the proper internal pressure is maintained, there is complete combustion at the burner nozzle within carbon deposit. A greater or less gas supply in accordance with the grade of' oil employed may be conducted by an adjustment of the collar on the valve stem. The outer and inner coil springs controlling the action of the piston and passage of oil through the apertures of the piston being completely immersed in the oil are always positive in operation. The strength of the springs thus employed is of course dependent upon the internal pressure desired in the particular apparatus and system since it will be understood that in large commercial installations, greater pressures may be re uired than in oil burning systems for dwe lings. The drawings are therefore illustrative only since I do not wish to be limited or restricted to the size, proportions, strength of material or specific connections and assembly of parts employed, but reserve the right to make such changes, alterations and substitutions as will fairly fall within the scope of the subject matter now being claimed.

Having shown and described my invention what I claim as new and desire to secure by Letters Patent is 1. Pressure control mechanism for liquid fuel burning apparatus in combination with an oil and gas line. a pressure housing,a piston within said housin a liquid fuel inlet to said housing above the piston head, a spring engaging said piston against the internal oil presssure, said piston head having apertures therethrough and a freely movable valve for closing said apertures when the internal pressure on said piston falls below a predetermined point, interconnected valves in the said oil and line, a stem connecting said valves with the piston, said piston controlling the open and closed position of said valves in accordance with the internal oil pressure 011 the piston head.

2. Pressure control mechanism for liquid fuel burning apparatus in combination with an oil and gas line, apressure housing, a piston within said housing, a liquid fuel inlet to said housing above the piston head, a spring engaging said piston against the internal oil pressure, said piston having a series of apertures therethrough, a pair of interconnected valves controlling the flow of oil and gas through the said oil and gas lines, a stem connecting the said piston and valves, a freely movable valve on the same for opening and closing the said apertures in the piston and a spring controlling the position of said freely movable valve in accordance with the internal pressure on said piston.

3. Pressure control mechanism for liquid fuel burning apparatus in combination with an oil and gas line, a pressure housing, an oil chamber below said housing, valve housings having valves connected to said chamber, said valves controlling the passages in the oil and gas lines, a piston within the pressure housing, a stern connecting the piston with said valves said piston being movable through the bottom of the pressure housing,

apertures in the piston head, a freely movable valve on the stem controlling the flow of oil through said apertures when the in ternal pressure on said piston head falls below a lower predetermined point.

4. Pressure control mechanism for liquid fuel burning apparatus in combination with an oil and gas line, a pressure housing, a piston within said housing, an oil chamber below the housing, valve housings connected to said oil chamber having interconnected valves controlling the passage of oil and gas in said oil and gas lines, said piston and valves being connected for operation in unison when the internal pressure of the oil in said pressure housing falls below a predetermined point and return pipes from the said pressure housing and chamber.

5. Pressure control mechanism for liquid fuel burning apparatus in combination with an oil and gas line, a pressure housing, a piston within said housing, a polygonal socket and an adjusting wheel for lowering and raising the piston within the housing, said housing having an oil inlet above the piston head, an oil chamber below the housing, interconnected valves and a stem ad- 'justable with the piston, said valves con- EDlVARD BROMLEY RODGERS. 

